US 9,810,187 B2
Circuit arrangement for inductively heating a fuel injector valve
Stephan Bolz, Ruhpolding (DE); and Martin Goetzenberger, Ingolstadt (DE)
Assigned to Continental Automotive GmbH, Hanover (DE)
Appl. No. 14/424,516
Filed by CONTINENTAL AUTOMOTIVE GMBH, Hannover (DE)
PCT Filed Aug. 8, 2013, PCT No. PCT/EP2013/066652
§ 371(c)(1), (2) Date Feb. 27, 2015,
PCT Pub. No. WO2014/032935, PCT Pub. Date Mar. 6, 2014.
Claims priority of application No. 10 2012 215 264 (DE), filed on Aug. 28, 2012.
Prior Publication US 2015/0240766 A1, Aug. 27, 2015
Int. Cl. H05B 6/06 (2006.01); B05B 1/24 (2006.01); H02M 7/537 (2006.01); H05B 3/02 (2006.01); F02M 53/06 (2006.01); F02D 41/20 (2006.01)
CPC F02M 53/06 (2013.01) [F02D 41/20 (2013.01); H05B 6/06 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A circuit configuration for inductively heating a fuel injection valve, the circuit configuration comprising:
an injection valve heater coil having connections forming a first node and a second node;
a capacitor connected in parallel with said heater coil;
a first inductance connected between a positive terminal of a supply voltage and said first node;
a second inductance connected between the positive terminal of the supply voltage and said second node;
a first controllable switching element connected between said first node and a negative terminal of the supply voltage, said first controllable switching element having a control input;
a second controllable switching element connected between said second node and the negative terminal of the supply voltage, said second controllable switching element having a control input; and
a control unit connected to said control inputs of said controllable switching elements, said control unit applying a respective switch-on level to said controllable switching elements when a voltage at a respective node to which a respective switching element is connected becomes 0 volt and dimensioning a switch-on duration of the respective switching element in accordance with a preset heating power.